Playing on the Java Edition 1.17 on my creative building world when I found that the buttons on the top and bottom of the menu had a pig's texture. Looking more into it, every shadow cast by a mob or an item turns into the pig texture. Reloading the world does nothing, but leaving the game and coming back did change the menu and shadows back to normal. I have no idea if its even possible to replicate something like this.
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We're tracking this issue in MC-181280 and MC-229912, so this ticket is being resolved and linked as a duplicate.
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